PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-15:13:10
G10     244.1          20.2                7.7 +/-    3.28      16.9 +/-    3.28  0.040 / 0.030
G13     62.9           34.7                8.9 +/-    1.08      14.1 +/-    1.08  0.050 / 0.030
G15     100.5          56.8               10.2 +/-    0.98      11.9 +/-    0.98  0.120 / 0.150
G16     307.7          13.0                6.2 +/-    2.35      16.2 +/-    2.35  0.180 / 0.190
G18     259.4          52.5                9.9 +/-    2.30      12.1 +/-    2.30  0.050 / 0.100
G20     34.3           58.3                7.7 +/-    0.69       8.9 +/-    0.69  0.060 / 0.080
G21     331.1          58.7                6.4 +/-    0.64       7.4 +/-    0.64  0.030 / 0.040
G26     278.3          17.9                7.6 +/-    1.04      17.7 +/-    1.04  0.040 / 0.050
G29     159.8          54.6               11.4 +/-    0.38      13.7 +/-    0.38  0.130 / 0.330